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Krzysztof Pyrkosz 83e4b068d9 avcodec/aarch64/aacencdsp: NEON implementation 
This patch supplies handwritten NEON code for AAC.

The benchmarks below were collected by invoking these two commands on
each of my boards, A78, A72 and Thinkpad x13s:
1) ./tests/checkasm/checkasm --test=aacencdsp --bench --runs=12
2) ./ffmpeg -y -t 10:00 -f lavfi -i sine /tmp/foo.aac (the first line is
speed without the patch, second, with)

- A78
abs_pow34_c:                                          4161.5 ( 1.00x)
abs_pow34_neon:                                       3586.2 ( 1.16x)
quant_bands_signed_c:                                 5548.0 ( 1.00x)
quant_bands_signed_neon:                              1126.8 ( 4.92x)
quant_bands_unsigned_c:                               3979.2 ( 1.00x)
quant_bands_unsigned_neon:                             800.2 ( 4.97x)

size=    5251KiB time=00:10:00.00 bitrate=  71.7kbits/s speed=71.6x
size=    5251KiB time=00:10:00.00 bitrate=  71.7kbits/s speed=82.3x

- A72
abs_pow34_c:                                         15362.2 ( 1.00x)
abs_pow34_neon:                                      15382.5 ( 1.00x)
quant_bands_signed_c:                                 9926.5 ( 1.00x)
quant_bands_signed_neon:                              2467.8 ( 4.02x)
quant_bands_unsigned_c:                               5469.8 ( 1.00x)
quant_bands_unsigned_neon:                            2089.5 ( 2.62x)

size=    5251KiB time=00:10:00.00 bitrate=  71.7kbits/s speed=34.3x
size=    5251KiB time=00:10:00.00 bitrate=  71.7kbits/s speed=37.8

- x13s
abs_pow34_c:                                          2413.4 ( 1.00x)
abs_pow34_neon:                                       1796.2 ( 1.34x)
quant_bands_signed_c:                                 2968.9 ( 1.00x)
quant_bands_signed_neon:                               675.6 ( 4.39x)
quant_bands_unsigned_c:                               2311.9 ( 1.00x)
quant_bands_unsigned_neon:                             477.1 ( 4.85x)

size=    5251KiB time=00:10:00.00 bitrate=  71.7kbits/s speed= 135x
size=    5251KiB time=00:10:00.00 bitrate=  71.7kbits/s speed= 159x

Signed-off-by: Martin Storsjö <martin@martin.st>
2025-01-28 10:44:40 +02:00
compat compat/w32pthreads: change pthread_t into pointer to malloced struct 2024-12-16 09:43:19 +01:00
doc avfilter/setpts: add option strip_fps to decide framerate handling 2025-01-27 15:40:09 +05:30
ffbuild ffbuild/bin2c: misc fix 2025-01-13 23:58:36 +08:00
fftools fftools/ffmpeg_filter: remove accidental variable shadowing 2025-01-26 20:53:11 -03:00
libavcodec avcodec/aarch64/aacencdsp: NEON implementation 2025-01-28 10:44:40 +02:00
libavdevice avdevice/dshow: fix unused variable warning 2024-10-17 13:04:17 +02:00
libavfilter avfilter/setpts: add option strip_fps to decide framerate handling 2025-01-27 15:40:09 +05:30
libavformat avformat/hls: Be more picky on extensions 2025-01-26 01:12:28 +01:00
libavutil avutil/frame: add a side data prop to signal channel layout dependent types 2025-01-25 21:56:49 -03:00
libpostproc */version.h: bump after release/7.1 branch 2024-09-24 17:10:35 +02:00
libswresample arm: Consistently use proper interworking function returns 2024-10-09 15:52:51 +03:00
libswscale swscale/swscale: don't reject scaling when color parameters are not supported but conversion is not required 2025-01-22 12:15:18 -03:00
presets
tests avfilter/setpts: add option strip_fps to decide framerate handling 2025-01-27 15:40:09 +05:30
tools tools/target_swr_fuzzer: do not use negative numbers of samples 2025-01-21 22:55:10 +01:00
.gitattributes lavf/assenc: normalize line endings to \n 2024-02-11 17:01:07 -08:00
.gitignore .gitignore: add exclusions for shader .c files 2024-11-18 07:54:21 +01:00
.mailmap mailmap: add entry for myself 2024-07-15 01:59:37 +02:00
Changelog avformat/matroska: add support for VVC streams 2025-01-12 11:13:31 -03:00
configure avfilter/avfilter: Add FFFilter, hide internals of AVFilter 2025-01-12 15:41:40 +01:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS Use https for repository links 2023-03-01 21:59:10 +01:00
INSTALL.md INSTALL: explain the circular dependency issue and solution 2024-11-03 19:35:23 +01:00
LICENSE.md avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS MAINTAINERS: Lauri is still available but is really low on time nowadays 2024-11-28 23:19:00 +01:00
Makefile configure: Add wasm as a fake arch 2024-12-04 16:43:06 +08:00
README.md README: fix typo and description of libavfilter 2021-10-08 09:44:34 +05:30
RELEASE RELEASE: update release number after release/7.1 branch 2024-10-09 01:55:50 +02:00

README.md

FFmpeg README

FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.

Libraries

  • libavcodec provides implementation of a wider range of codecs.
  • libavformat implements streaming protocols, container formats and basic I/O access.
  • libavutil includes hashers, decompressors and miscellaneous utility functions.
  • libavfilter provides means to alter decoded audio and video through a directed graph of connected filters.
  • libavdevice provides an abstraction to access capture and playback devices.
  • libswresample implements audio mixing and resampling routines.
  • libswscale implements color conversion and scaling routines.

Tools

  • ffmpeg is a command line toolbox to manipulate, convert and stream multimedia content.
  • ffplay is a minimalistic multimedia player.
  • ffprobe is a simple analysis tool to inspect multimedia content.
  • Additional small tools such as aviocat, ismindex and qt-faststart.

Documentation

The offline documentation is available in the doc/ directory.

The online documentation is available in the main website and in the wiki.

Examples

Coding examples are available in the doc/examples directory.

License

FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.

Contributing

Patches should be submitted to the ffmpeg-devel mailing list using git format-patch or git send-email. Github pull requests should be avoided because they are not part of our review process and will be ignored.